Australia once lost a prime minister -- as in straight up couldn't find him. And they have yet to find him.

Harold Holt, Australia's 17th Prime Minister, disappeared on December 17, 1967. He went for a swim with a few friends and disappeared. The largest search-and-rescue operation in the nation’s history found no body. Conspiracy theories abound including that Holt was assassinated by secret agents from the Soviet Union, was picked up by a Chinese submarine or UFO. Two days after he went missing, Holt was presumed dead and a funeral service was held for him on December 22.